This is a mid-19th c. unmarked 14 karat gold shell came of Medusa. The carving is very fine, as is typical of that age, and displays no stress or damage. The brooch has a Greek key border; the clasp is a heavy C. It measures 1 & 1/2" and except for a wobbly bezel (the shell may dip in a little and the bezel pressed to it) is in very fine condition.